Ground-auger.



H. FUCHS.

GROUND AUGER.

APPLICATION FILED JAN. 6, 1914.

1,107,927, I Patented Aug. 18, 191i MHHEEEEE [In/5min? HEINRICH FUCHS, or ERIEnRIcIIsEELnE, NEAR BERLIN, GERMANY.

. GRQUND-AUGER' Specification of Letters Patent. Patented Aug. 18, 1914- Application filed January 6, 1914. Serial No. 810,555.

To all whom it may concern: I

Be it known that I, IIEINRIoH F cHs, a subject of the German Emperor, and residing at Friedrichsfelde, near Berlin, Germany, have invented certain new and useful Improvements in Gr0und-Augers,of which the following is a specification.

This invention relates to a ground auger which is intended to produce holes adapted to receive posts, poles, piles, and the like. Among the augers employed for this purpose, there is known also a form of con struction in which the lower end of a rod having a wooden handle is provided with a serpent drill or hit, the upper part or end of which is made integral, or connected, with a circular plate of larger diameter shaped like a thread of a screw.

Now, in my improved ground auger, a rotary knife or roughing knife or cutter is arranged between the bit part and the plate part of the ground auger, that knife'or cutter, or the knives or cutters because there are generally two in juxtaposition, having such a length that the. diameter of the circular path covered by it or them is longer than that of said screw thread shaped plate. The ground to be removed by the latter is thus cut, or pre-cut, before the said plate, or auger-head, touches. or penetrates into it, whereby the work is greatly facilitated and much power is saved, because tearing off the ground as done hitherto withthe old ground auger, z". 6., at the circumference of its head, requires a considerable expenditure of power, also when the auger is to be drawn out of the hole, since then a sucking action arises below the plate in question; also this is prevented by the appropriately chosen length of the cutters mentioned. The ground is, in a sense, out into disks, the periphery of each disk being cut by the rotary cutters and the bottom surface being cut by the screw thread shaped plate. This is particularly advantageous in the case of. heavy ground, loam, and clay, which may be penetratedfar more easily in consequence of that ground, etc., being appropriately loosened previous to the auger plate entering into it.

Where rather soft ground is to be bored there the cutters in question need not be distinct parts, but they may be made integral with the circular drilling disk or plate, '5. 0., the head of the auger, as is all more fully described hereinafter.

My invention is illustrated in the accompanying drawing, in which Figure 1 is a side-view of the principal form of construction of my improved ground auger; Fig. 2 is a plan of the screw thread shaped top plate; and Fig. 3 is a bottom view of the newly added tool viz. the rotary cutter J.

The whole ground auger consists of the bar a, which is square-shaped at its lower end I); the drill a, the cutter d, and the drill disk or plate 6. The parts d and e are shoved upon the square I). The cutter d has knives f which cut the ground prior to the tool e penetrating into it, as already described. The cutter d f is sharpened, of course, also at those of its horizontal edges that come first when the tool is rotated in its working direction.

The parts d and .e are exchangeable, and they are chosen according to the diameter of the hole to be produced. Instead of one set of tools at and 6, two may be employed if the holes to be produced shall be rather large, for instance more than 35 centimeters, say:

. centimeters, in width. In such a case I first put a tool 03 f and a tool 6 for 25 centimeters upon the square I) and then a tool 01 f and a tool 0 for 45 centimeters, the heights of the bosses of the tools being, of course, suitably reduced.

Having now described my invention, what I desire to secure by a patent of the United States is:

1. In a ground auger, the combination, with a serpent drill (a), a screw thread shaped bore disk (6) above the serpent drill, and a bar (at) having the disk attached to it, of a knife-like cutting tool located upon said bar between said drill and said disk, the diameter of said tool being somewhat longer than that of the said disk, for the purpose as described.

2. In a ground auger comprising a serpent cutting tool being exchangeable, substandrill an dupwardly extending bar of the t-ially and for the purpose as described. samean a screw thread shaped bore disk 1 I shove d upon said bar the combinatiomwith HEINRICH FUCHS 5 said drill, bar, ELIIQUdlSlQ ofa knifedike eut- Witnesses:-

ting tool adapted to be used in connection WVOLDEMAR HAUPT, With said disk;,this latter, as well as said. HENRY HAsPEnr Copies of this patent may be obtained for five cents each by? addressing the Commissioner of Iatents, Washing con,- D.- G. 

